need to learn how to solve using nominal rate, pure rate, inflation rate and risk premium

3 (Present value and time) An investment promises to return $20,000 in 1 year while a second investment promises to return $186,350 in 30 years. Investors re- quire an 8% rate of return from both investments. a. What is the present value of each investment? b. What happens to the present value of each invest- ment if the required rate of return rises to 10%? c What happens to the present value of each invest- ment if the required rate of return falls to 6%? d. Why do the present values change this way